package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.ex.CustomException;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.pojo.*;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService shoppingCartServlet;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    @Override
    @Transactional
    public void submit(Orders orders) {

        //A. 获得当前用户id, 查询当前用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        log.info("currentId..................{}",currentId);
        LambdaQueryWrapper<ShoppingCart> lqw=new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,currentId);
        List<ShoppingCart> list = shoppingCartServlet.list(lqw);
        log.info("list...............{}",list);
        if (list==null || list.size()==0){

            throw new ClassCastException("购物车都没东西,你买个屁!");
        }
        //B. 根据当前登录用户id, 查询用户数据
        User user = userService.getById(currentId);
        log.info("用户名:...............{}",user);



        //C. 根据地址ID, 查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook==null){
            throw new CustomException("地址错了");
        }

        //D. 组装订单明细数据, 批量保存订单明细

        long id = IdWorker.getId();

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = list.stream().map((item)->{

            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(id);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //E. 组装订单数据, 批量保存订单数据

        orders.setId(id);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(currentId);
        orders.setNumber(String.valueOf(id));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //F. 删除当前用户的购物车列表数据
        shoppingCartServlet.remove(lqw);
    }
}
